Air-compressor.



E. A. RIX.

AIR COMPRESSOR.

nrucmou men Jun: 25. 1914.

1,182,507. A Patented May 9,1916.

2 SHEEIS-SQEETI.

E. A. RIX.

AIR COMPRESSOR.

nrrucmou mm JUNE 25. m4.

1,182,507. Y Patentd May9, 1916.

2 SHEETS-S MEET 2.

mm: INVESTOR 4 Br I mmpumm-mmc.

w of which the following is a- I faitla'uzdinteg'ralwlthabasecastingorstand 4s multi-cylinder cylinders are radially a ion that, together with a novel form of rofilft,

m 'whichis between the-multi-cylin- STATES PATENT OFFICE.

' I nnwann A. am, or sex rmcrsco, camromwia.

Specification of Letters Patent.

Patented May 9, 1916.

Application fled June 25, 1914. Serial No. 847208.

To aawkomitmay concern:

BeitknownthatLEnwannLRnga citizen of the United States, residing at the city and county of San Francisco and State of California, have invented new and useful Improvements in Air-Compressors,

tion. This invention relates to a multi-cylinder air compresor, and pertains especially to a cylinder t therefor and asingle valve to control inhaust and exhaust. One of the objects of'the present invention is to provide a simple, substantial, multi-cylinder, high-speed oompresor in which the in such fashtaryvalve mechanism, a relatively long valve may hem-for a silnall motiono .the piston, us owin'gt eports tobelarge-andtoremainwide open a relativelylong 'od of Another ject of the invention is to reduce the clearance between the cylinders and valve to leave the space possible, and to correspondingly reduce the area or diameter of the valve. Further will hereinafter appear. The invention consists ofthe parts and the w m and combination of parts as fully described and claimed, having refermce to the accompanymidrawings, m which ignrellsaverticalcrosssection ofthe compmor. Fig. 2 is a front view' of the comprm' or, showing the rotary valve removed. Fig. 3 is a-cros section of the valve (11 inn plurality. of radiall cylinders, which are -semred,as at 2, to a faceplate 3,

, 6.isashaftjournaledin formed "on theupp'er mid ofthe' standard 4: and extending through portion of the aneccmh'ic'formedintegralwiththe or secured vand der unit and the plate 3. Surrounding the eccentric is a segmental ring 8, of suitable construction, and connecting said strap with p1stons 9 is a series of connecting-rods 10; connection being formed between each piston and rod by any convenient means, as an angularly pro1ectin pin or stud 11, which extends through a 5 0t 12 formed in the side of each cylinder.

' Formed integral with the multi-cylinder caszmg m a central 'tion on same is an extension 13, in which is formed a valve chamber, and connecting said chamber with the inner end of each individual cylinder'is a port 14. A rotary disk-shaped valve 15 is suitabl secured on the outer end of shaft 6, which tter projects into the valve chamber; valve 15 being provided with two ports 16 and 17, one 0 which 16 bein the inlet and 17 the outlet. Port 16 is ormed on the inner face of the valve'15 and is adapted to communicate with a central passage 18 formed in the center of the cylinder casting and is also ladapted lie communigaglgith the ports 14;-t e centre passage 1 g o to the atm here by means of a plumliz y of radially disposed ports 19 substantially as shown inFigs. 1 and 2. Port 17, or the exhaust port, extends clear thro h the valve and is adapted to form an 0 et for the compressed air from a cylinder and port 14 into the valve chamber, from where the air may be conducted through a pipe or means connected with an extension 20 the. valve-chamber being closed by a suitable means, as a plug-21. In operation, wer is transmitted through shaft 6, prefera ly by making a direct connection with 'an electric motor or the like. The rotary movement of the shaft will thus be transimtted through the eccentric 7, straps to 8 andconnecting rods 10 to the pistons 9 which will consequently be rec! rocated within the cylinders A. Valve 15 ing secured on the outer end of the shaft cordingly turn with the shaft, in comunc- 95 tron with the reciprocating-pistons, in such used, and preferably wardly moving piston, and exhaust port 17 in position with a cylinder under compression. The outward movement of the piston within the cylinder will cause a suction in the usual manner and cause the air to be drawn from the outside atmosphere through the ports 19, central. pas'age 18, and ports 16 and 14 into a cylinder. The continuous revolving movement of the shaft will port 16 out of register with the port 14 the moment piston 9 begins to travel inwardly for compression, and will similarly bring the port 17 mto register with said port 14 until the piston 9 has completed the compression stroke.

The inner ends of the cylinders, together with the pistons mounted therein, are preferably conoidal, as shown in Fig. 1. This permits the cylinders to be placed very close together and consequently permits reduc- .tion of the valve area to a minimum. The close relation between the inner abutting ends of the several cylinders permits a close arrangement of the ports 14 and consequently the application of a valve of small diameter. A small valve thus produced consumes very little power for its operation and is, ermore, automatically seated by the pressure of the exhausting air in the valve chamber. The arrangement of the ports 16 and 17, furthermore, permits a relatively long. valve travel for a small motion of the piston, thus allowing the ports to be large and to remain wide open a good portion of the iston stroke.

' driving connection formed between the shaft and pisto' permits a high speed of operation, and the driving connection bethe shafigapil valve, together with the arrangement 0 e 'rts, permits the use of a single automal ally valve, both for exhaust and inlet, in coniunction with a plurality of cylinders.

While the cylinders and pistons here shown are conical shape at their, inner ends h for the purpose of rodllcmg' the smallest diameter of valve and the least loss possible, with relation to clearance, it is obvious that these may be entirely eliminated inlarger units. It should also be understood that the air may be admitted in any suitable-or convanent manner.

essentially a speed comprgoqandinordertofiiteflicimtat a high speal a mechanical valve mustbe a rotative valve of-the shown, which gives a relatively long valve travel for a small motion of the pmomthusailowmgtheporistobelarge aftorunamwldeopena' of permitsvery mtative speed otherwise with any the pressumho the valve on-its saagit isevident that the minimum ower expended in driving the valve will lie when the valve is of the smallest possible diameter. In order to make this diameter within the necessary limits, it is necessary to butt the working ends of the cylinders at the center. The working ends of the cylinders cannot be placed on their outward ends, for a port leading from these out-ward ends to a valve at the center would have such an amount of clearance that at a very small pressure the clearance would absorb the entire contents of the cylinder and no work could be done. Three requisites, therefore, are combined in this invention, namely: small diameter of rotative valve; short clearance; and centrally abutting cylinders. I have shown the cylinders covered with radiator fins for air cooling. The machine can be made either air or water cooled, as desired.

It is manifest that various changes in form, proportions and minor details of construction may be resorted to the scope of the appended claims and I do not wish to limit myself to the specific design and construction here shown.

Having thus described my invention, what I claim and desire to secure by Patent is- V 1. In a comprmor of the class described, the combinaliiirxaliz1 of a pclfilltllllitz of radiallly arrangedcy ers,ea,avmga e port at its inner end, a rotatable valve, the ports of said valve being so disposedthateachportwillregisterwithflie single port of the cylinders upon rotation of said valve to control the inlet and outlet for each cylinder in suocesion.

2. In a device of the class described, the combination with a plurality of radially disposed cylinders having conoidal inner. to permit thesame to be assembled in close correlative relation one with the other, of a central valve chamber, said cylinders each aving' a single port connecting said conoidal cylinders with the valve chamber, and a rotatable valve having ports so disposed that the will each register with the port .ofsaid cyhnders.

3. In a compressor of the class described, the combination of a plurality of radially disposed abutting cylinders each having a conoidal inner end provided with a le port, .a rotatable valve adjaeait .to abutting ends of the cylinders, radially disposed ports between the cylinders in communication with the atmosphere and adapted to supply air to one side .of the valve, said valve havingports-adapted to mgider withthe ofeachcylindertocontr ll iiiltake and exhaust of said an air reset, 1; urahty' of radially having a series ofooncentncallydiqioeedportgmdaninlet ends,

chamber concentrically within the In testimony whereof I have hereunto set line of said ports, radial inlets leading to my hand in the presence of two subscribing 13 said chamber, a shaft extending through said witnesses.

inlet chamber, a valve chamber having an 5 exhaust opening and a rotatable valve on EDWARD said shaft witlnn said valve chamber oon- Witnesses: f necting the cylinders periodically with the JOHN H. Hmmmo, air inlet chamber and the exhaust opening. W. W. Hmnnr.

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